Wingspan 28 to 32 mm. Rather similar to the Sharp-angled Peacock, although usually slightly paler with less grey suffusion. Typically the dark notch near the forewing tip is less concave, and the broken blotch in the centre is more distinct. Peacock also usually has a clean dark line around the hindwing fringe, which is broken or dotted in Sharp-angled Peacock. However, some of these features can be difficult to see in worn specimens.

It occurs in woodland habitat.

The adults are on the wing during May and June (and occasionally again in August in the south).

The dull brownish caterpillars feed mainly on birch.

Mainly found in the southern half of England and Wales, though it occurs sparingly in parts of Scotland and Ireland. In a recent survey to determine the status of all macro moths in Britain this species was classified as local.

It appears to be uncommon in Leicestershire and Rutland, where there are few records. L&R Moth Group status = D (rare or rarely recorded).